Question

I have a Geometry question if anybody can help!! :) thnx!!!

Answer 1

welcome!!!

Answer 2

In triangle DEF, what is the length of DF?

Answer 3

here is the question.....i am not really sure how to do it??

Answer 4

Well, for starters, DF is the hypotenuse of this right triangle, right? :)

Answer 5

yes!!

Answer 6

Yes... let's redraw this figure, but only including the relevant stuff...

Now, with respect to the sixty degree angle, what is the side measuring 45?

Answer 7

I am not really sure I would think the other angle down below would be 30 degrees if there was one?? I would guess it would be 30 square root of three??

Answer 8

Hang on :)
Is this side...

Opposite to the 60 degree angle? Is it adjacent to it?

Answer 9

Oh wait, it seems like you already got the answer down...

Answer 10

wait what??

Answer 11

Okay, forget what I said. Do you use sines and cosines already? :D

Answer 12

yes I did but can you give me the math part of the equation like how to do it?? I mean I think I know how to do it but I need someone to just write out how they did the equation! if that makes any since??

Answer 13

Okay, you want to use sines and cosines, or just the properties of the so-called
30-60-90 triangles?

Answer 14

YES!!!

Answer 15

Yes, what? I gave you a choice :P

Answer 16

oo sorry I only looked at the last one which is 30-60-90 traingles that is what i wanted

Answer 17

LOL OK :)
so... suppose we have a 30-60-90 triangle

Answer 18

okay :)

Answer 19

Now, if one side measures...
This is the side opposite the 30-degree angle, right?

Answer 20

yes!

Answer 21

Well, in this case..., the angle opposite the 60-degree angle would measure...

And the hypotenuse would measure